He joins the hit CW show as recurring character Ray Palmer: a scientist and inventor who becomes the new owner of Queen Consolidated and a new force in the lives Oliver Queen (Stephen Amell) and Felicity Smoak (Emily Bett Rickards).

In the DC Comics universe, Palmer is the alter-ego of The Atom, a superhero who changes his size at will, so it should be interesting to see how small Routh might actually get in his return to the small screen.

Though the 34-year-old actor is best known for starring in the 2006 Bryan Singer-directed blockbuster “Superman Returns,” he has also found TV success before on “Chuck.”